never show which node is selected in Postback

[Mohamad Javad]

hi
when the webpage is postback the treeview , never show which, node is selected before the postback the page.
how to save state tree view node selected, after postback page?

[Shinu]

Hi Mohamad Javad,

You can store the state of RadTreeview in a session variable as follows.

Session["myTreeView"] = rtreeDemoList.GetXml();

And you can restore the RadTreeView state from the session variable in appropriate event like this.

string treeViewState = (string)Session["myTreeView"];
rtreeDemoList.LoadXmlString(treeViewState);

Let me know if you have any concern.
Thanks,
Shinu.

[Mohamad Javad]

thanks. but I've not helpful.
how to set the special node,is selected in c# code.
Almost like the code below is my requirement:

RadTreeView1 . SelectedNode . Node . Value = 7 ;

for set for example:node with value=7 is selected with click button or set this after postback page.

[Mohamad Javad]

In other words, a node can click the Button, I want to get the image, and the style is different from that node by default comes in a blue..

[Shinu]

Hi Mohamad Javad,

I guess you want to select a node in OnClick event of RadButton. Please have a look into the sample code snippet which works fine at my end. Please elaborate your requirement if it doesn't help.

ASPX:

<telerik:RadTreeView ID="rtreeDemoList" runat="server">
    <Nodes>
        <telerik:RadTreeNode Text="All" Value="1">
            <Nodes>
                <telerik:RadTreeNode Text="Unread" Value="2">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode Text="Inbox" Value="3">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode Text="Sent Items" Value="4">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode Text="Deleted Items" Value="5">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode Text="Search" Value="6">
                </telerik:RadTreeNode>
            </Nodes>
        </telerik:RadTreeNode>
    </Nodes>
</telerik:RadTreeView>
<telerik:RadButton ID="rbtnSelectItem" runat="server" Text="Select Node" OnClick="rbtnSelectItem_Click">
</telerik:RadButton>

C#:

protected void rbtnSelectItem_Click(object sender, EventArgs e)
{
    foreach (RadTreeNode parentNode in rtreeDemoList.Nodes)
    {
        foreach (RadTreeNode childNode in parentNode.Nodes)
        {
            if (childNode.Value == "6")
                childNode.Selected = true;
        }
    }
}

Thanks,
Shinu.

[Mohamad Javad]

Shinu.very thanks

​50% of your code solved my problem.
Now I know how I can find which node is Selected when Click the Button?
and Save The value of node,in variable e.g. int variable.
very thanks

[Shinu]

Hi Mohamad Javad,

I guess you want to get the selected node value on the button click. Please have a look into the below C# code snippet to achieve your scenario.

C#:

protected void rbtnSelectItem_Click(object sender, EventArgs e)
{
    int selectedValue;
    foreach (RadTreeNode parentNode in rtreeDemoList.Nodes)
    {
        if (parentNode.Selected)
        {
            selectedValue =Convert.ToInt16(parentNode.Value);
            break;
        }
        foreach (RadTreeNode childNode in parentNode.Nodes)
        {
            if (childNode.Selected)
            {
                selectedValue = Convert.ToInt16(childNode.Value);
                break;
            }
        }
    }
}

Please elaborate your requirement if it doesn't help.
Thanks,
Shinu.